<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q">
          <el-form-item label="文章分类">
            <el-select v-model="q.cate_id" placeholder="请选择分类" size="small">
              <el-option v-for=" item in cataList" :key="item.id" :label="item.cate_name" :value="item.id"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="loadArtList">筛选</el-button>
            <el-button type="info" size="small" @click="resetForm">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="pubVisible = true">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
        <el-table
          border
          stripe
          :data="artList"
          style="width: 100%">
          <el-table-column
            prop="title"
            label="文章标题">
            <template v-slot='{row}'>
              <el-link type="primary" @click="showArt(row.id)">{{row.title}}</el-link>
            </template>
          </el-table-column>
          <el-table-column
            prop="cate_name"
            label="文章分类">
          </el-table-column>
          <el-table-column
            label="发表时间">
            <template v-slot='{row}'>
            {{formatDate(row.pub_date)}}
          </template>
          </el-table-column>
           <el-table-column
            prop="state"
            label="状态">
          </el-table-column>
           <el-table-column
            label="操作">
            <template v-slot='{row}'>
              <el-button type="danger" size="mini" @click="remove(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>

      <!-- 分页区域 -->
       <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="q.pagenum"
          :page-sizes="[2, 4, 5, 10,20]"
          :page-size="q.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
        </el-pagination>
    </el-card>
    <!-- 发表文章的dialog -->
    <el-dialog
      fullscreen
      title="发表文章"
      :visible.sync="pubVisible"
      :before-close="handleClose">
      <el-form :model="pubForm" :rules="pubRules" ref="pubForm" label-width="100px" class="demo-pubForm">
        <el-form-item label="文章标题" prop="title">
          <el-input v-model="pubForm.title"></el-input>
        </el-form-item>
        <el-form-item label="文章分类" prop="cate_id">
            <el-select v-model="pubForm.cate_id" placeholder="请选择分类" style="width: 100%;">
              <el-option v-for="item in cataList" :key="item.id" :label="item.cate_name" :value="item.id"></el-option>
            </el-select>
        </el-form-item >
        <el-form-item label="文章内容" prop="content">
          <quill-editor v-model="pubForm.content" @blur="$refs.pubForm.validateField('content')">
          </quill-editor>
        </el-form-item>
        <el-form-item label="文章封面" prop="cover_img">
          <!-- 用来显示封面的图片 -->
          <img v-if="preview" :src="preview" alt="" class="cover-img" ref="imgRef" />
          <img v-else src="../../../assets/images/cover.jpg" alt="" class="cover-img" ref="imgRef" />
          <br />
          <!-- 文件选择框，默认被隐藏 -->
          <input type="file" style="display: none;" accept="image/*" ref="iptFile" @change="hChange"/>
          <!-- 选择封面的按钮 -->
          <el-button type="text" @click="$refs.iptFile.click()">+ 选择封面</el-button>
        </el-form-item>
        <el-form-item  prop="state">
          <el-button type="primary" @click="hPub('已发布')">发布</el-button>
          <el-button type="info" @click="hPub('草稿')">存为草稿</el-button>
        </el-form-item>

      </el-form>
    </el-dialog>
    <!-- 文章发布列表查看dialog -->
    <el-dialog
      title="文章预览"
      :visible.sync="artDialogVisible"
      width="65%">
       <h2 class="title">{{ artDial.title }}</h2>

        <div class="info">
          <span>作者：{{ artDial.nickname || artDial.username }}</span>
          <span>发布时间：{{formatDate( artDial.pub_date ) }}</span>
          <span>所属分类：{{ artDial.cate_name }}</span>
          <span>状态：{{ artDial.state }}</span>
        </div>

        <!-- 分割线 -->
        <el-divider></el-divider>

        <!-- 文章的封面 -->
        <img :src="'http://www.liulongbin.top:3008' + artDial.cover_img" alt="" />

        <!-- 文章的详情 -->
        <div v-html="artDial.content" class="detail-box"></div>
    </el-dialog>
  </div>
</template>

<script>
import dayjs from 'dayjs'
export default {
  name: 'ArtList',
  data () {
    return {
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      },
      pubVisible: false,
      pubForm: {
        title: '',
        cate_id: '',
        content: '',
        cover_img: '',
        state: ''
      },
      pubRules: {
        title: [
          { required: true, message: '请输入文章标题', trigger: 'blur' },
          { min: 1, max: 30, message: '文章标题的长度为1-30个字符', trigger: 'blur' }
        ],
        cate_id: [{ required: true, message: '请选择文章分类', trigger: 'change' }],
        content: [{ required: true, message: '请选择文章内容', trigger: 'blur' }],
        cover_img: [
          { required: true, message: '请输入文章封面', trigger: 'blur' }
        ]
      },
      cataList: [],
      preview: '',
      artList: [],
      total: 0,
      artDialogVisible: false,
      artDial: {}
    }
  },
  methods: {
    handleClose (done) {
      this.$confirm('此操作将导致文章信息丢失, 是否继续?', '提示', {
        type: 'warning'
      })
        .then(_ => {
          done()
        })
        .catch(_ => {})
    },
    async loadCateList () {
      const { data: res } = await this.$http.get('/my/cate/list')
      this.cataList = res.data
    },
    hChange (e) {
      const file = e.target.files[0]
      if (file) {
        this.preview = URL.createObjectURL(file)
        this.pubForm.cover_img = file
        this.$refs.pubForm.validateField('cover_img')
      } else {
        this.pubForm.cover_img = ''
        this.preview = ''
      }
    },
    // 发布文章
    hPub (state) {
      this.pubForm.state = state
      // 兜底校验
      this.$refs.pubForm.validate(async valid => {
        if (!valid) return
        const fd = new FormData()
        Object.keys(this.pubForm).forEach(k => fd.append(k, this.pubForm[k]))
        const { data: res } = await this.$http.post('/my/article/add', fd)
        // 提醒用户
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        // 关闭dalaog
        this.pubVisible = false
        // 重置表单
        this.$refs.pubForm.resetFields()
        // 清空图片
        this.preview = ''
        this.loadArtList()
        this.$refs.iptFile.value = ''
      })
    },
    // 获取文章发布列表
    async loadArtList () {
      const { data: res } = await this.$http.get('/my/article/list', { params: this.q })
      this.artList = res.data
      // console.log(this.artList)
      this.total = res.total
    },
    // 转换时间格是
    formatDate (date) {
      // 转换时间格式
      return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
    },
    // 每一页的条数显示
    handleSizeChange (val) {
      this.q.pagesize = val
      // pagenum 控制显示那一页
      this.q.pagenum = 1
      this.loadArtList()
      // console.log(`每页 ${val} 条`)
    },
    // 当前页数
    handleCurrentChange (val) {
      this.q.pagenum = val
      this.loadArtList()
      // console.log(`当前页: ${val}`)
    },
    resetForm () {
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      }
      this.loadArtList()
    },
    async  remove (id) {
      const confirm = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
      if (confirm !== 'confirm') return
      const { data: res } = await this.$http.delete('/my/article/info', { params: { id } })
      if (res.code !== 0) return this.$message.error(res.message)
      this.$message.success(res.message)
      if (this.q.pagenum > 1 && this.artList.length === 1) { this.q.pagenum-- }
      this.loadArtList()
    },
    async  showArt (id) {
      this.artDialogVisible = true
      const { data: res } = await this.$http.get('/my/article/info', { params: { id } })
      this.artDial = res.data
    }
  },
  mounted () {
    this.loadArtList()
    this.loadCateList()
  }
}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
/deep/ .ql-editor{
  height: 300px;
}
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
.el-pagination {
  margin-top: 15px;
}
</style>
